well, in the hindsight I'm actually not sure which repository Percona
uses to build Galera from, hence revision information may be
incompatible with the official Codership LP repository. I think you need
to ask Percona about the details. This one is definitely not official
2.2 and I'm not sure where the revision number comes from (official 2.1
is r129 and official 2.2 is r137 and this one is clearly taken in
between).